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authorMarc Zyngier <marc.zyngier@arm.com>2015-10-13 14:51:32 +0300
committerThomas Gleixner <tglx@linutronix.de>2015-10-13 20:01:23 +0300
commit11e4438ee330fab0f216ee7cc1b651cb2ddceb5d (patch)
treedbae43af6b5b90d852c57c6f1b59cb6cef4866b2 /include/linux/irqdomain.h
parent130b8c6c8d86075304952241bf2365cea6489df1 (diff)
downloadlinux-11e4438ee330fab0f216ee7cc1b651cb2ddceb5d.tar.xz
irqdomain: Introduce a firmware-specific IRQ specifier structure
So far the closest thing to a generic IRQ specifier structure is of_phandle_args, which happens to be pretty OF specific (the of_node pointer in there is quite annoying). Let's introduce 'struct irq_fwspec' that can be used in place of of_phandle_args for OF, but also for other firmware implementations (that'd be ACPI). This is used together with a new 'translate' method that is the pendent of 'xlate'. We convert irq_create_of_mapping to use this new structure (with a small hack that will be removed later). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-5-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/irqdomain.h')
-rw-r--r--include/linux/irqdomain.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 607c1856cc01..533c974b9d94 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -46,6 +46,24 @@ struct irq_data;
/* Number of irqs reserved for a legacy isa controller */
#define NUM_ISA_INTERRUPTS 16
+#define IRQ_DOMAIN_IRQ_SPEC_PARAMS 16
+
+/**
+ * struct irq_fwspec - generic IRQ specifier structure
+ *
+ * @fwnode: Pointer to a firmware-specific descriptor
+ * @param_count: Number of device-specific parameters
+ * @param: Device-specific parameters
+ *
+ * This structure, directly modeled after of_phandle_args, is used to
+ * pass a device-specific description of an interrupt.
+ */
+struct irq_fwspec {
+ struct fwnode_handle *fwnode;
+ int param_count;
+ u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS];
+};
+
/*
* Should several domains have the same device node, but serve
* different purposes (for example one domain is for PCI/MSI, and the
@@ -92,6 +110,8 @@ struct irq_domain_ops {
unsigned int nr_irqs);
void (*activate)(struct irq_domain *d, struct irq_data *irq_data);
void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data);
+ int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec,
+ unsigned long *out_hwirq, unsigned int *out_type);
#endif
};